#define _CRT_SECURE_NO_WARNINGS 1

int countcs(struct ListNode* head)
{
    int cnt = 0;
    Linklist cur = head;
    while (cur)
    {

        if (cur->code[1] == '0' && cur->code[2] == '2')
        {
            cnt++;
        }
        cur = cur->next;


    }
    return cnt;
}